按建议继续完成后续工作

结论：upstream rs274 side-by-side 基线已继续扩展到 file-open reset 和 O-word subroutine fixture；完整 native 验证已通过。

wasm-port/docs/drift-report.md

@@ -68,8 +68,8 @@ semantic rewrites:
 - Fixture expectations are checked against the standalone vendored source
   path. The upstream `rs274` side-by-side baseline now covers simple motion,
   offsets, feed-control, comment/logging, numbered-parameter, spindle-orient,
-  file-finish, and tool-reload fixtures; adapter-heavy fixtures still need
-  dedicated native LinuxCNC baselines.
+  file-open reset, file-finish, tool-reload, and O-word subroutine fixtures;
+  adapter-heavy fixtures still need dedicated native LinuxCNC baselines.
 
 ## Current Drift Conclusion